Just look at this. Saw this for the first time a moment ago. Don't even know what to think.
Judging from our spawns, there doesn't appear to be any pattern for which vehicles spawn where, a la Westfield. We've got mediums, lights, a heavy and a TD in the west, and mediums, lights, and arty in the east.
I was in my 3002 M and tried to round the corner and make it to my favored semi-secret spot near the bridge and shoot people south, but apparently the red team spawns farther north than the 2 diamond suggests, I got tracked and had my engine removed very quickly despite the relative quickness of the 3002 M, by a T34 no less. Unless you're exceptionally fast I would not expect to be able to make it to the bridge from the north west spawn without having to fight the southern enemies.
Edit: Here's the layout of the cap circle. Yes, being on the bridge counts.
INB4: Turn off encounter.